how to translate app title

[doersoul]

easy_localization: ^3.0.8

@override
  Widget build(BuildContext context) {
    return MaterialApp.router(
      key: _key,
      title: 'title'.tr(),  // how translate app title?
      locale: context.locale,
      supportedLocales: context.supportedLocales,
      localizationsDelegates: context.localizationDelegates,
      ...
    );
  }